– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 3 pm Mon 15 Dec Local TimeUpdates in: hr min sUpdate imminent
Issued: 3 pm Mon 15 Dec Local Time
Updates in:
Update imminent hr min s
Issued: 3 pm Mon 15 Dec Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryHeavy rain (total 80mm), heaviest during Tue night. Later becoming colder with a dusting of snow on Tue night. Mild temperatures (max 9°C on Tue night, min 2°C on Tue night). Winds increasing (calm on Mon night, fresh winds from the WSW by Tue night). | Days 5–7 Weather SummaryA light fall of snow, heaviest on Fri morning. Turning milder with light rain (total 5mm) on Sun morning. Freeze-thaw conditions (max 5°C on Thu afternoon, min -1°C on Thu night). Wind will be generally light. | ||||||||||||||||
Mon 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  | |  |  | |  |  | | | | | | |  |  | |
heavy rain | mod. rain | mod. rain | mod. rain | light snow | light snow | mod. rain | light rain | light rain | light rain | light snow | light snow | light snow | light snow | light snow | some clouds | some clouds | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
— | — | — | — | 1 | 1 | — | — | — | — | 3 | 3 | 2 | 4 | 2 | — | — | |
11 | 9 | 6 | 7 | 29 | 3 | 7 | 4 | 4 | 2 | — | — | — | — | — | — | — | |
max°C | 8 | 4 | 6 | 8 | 9 | 2 | 2 | 3 | 4 | 5 | 1 | 1 | 1 | 1 | 2 | 1 | 1 |
min°C | 5 | 3 | 4 | 7 | 2 | 2 | 2 | 2 | 3 | 2 | -1 | 1 | 0 | 1 | 2 | 0 | -1 |
2 | 3 | 1 | 3 | -4 | -3 | -2 | -1 | -1 | -4 | -5 | -2 | -2 | -2 | 0 | -2 | -3 | |
1700 | 1050 | 1400 | 1950 | 850 | 750 | 850 | 950 | 950 | 1250 | 400 | 600 | 650 | 600 | 750 | 750 | 0 | |
Cloud base (m) | 550 | 600 | 550 | 500 | 500 | 600 | 600 | 550 | 500 | 500 | 600 | 550 | 550 | 600 | 600 | 550 | 550 |
 | — | — | 7:54 | — | — | 7:54 | — | — | 7:56 | — | — | 7:56 | — | — | 7:56 | — | — |
 | 4:12 | — | — | 4:12 | — | — | 4:12 | — | — | 4:12 | — | — | 4:13 | — | — | 4:13 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Heavy rain (total 80mm), heaviest during Tue night. Later becoming colder with a dusting of snow on Tue night. Mild temperatures (max 9°C on Tue night, min 2°C on Tue night). Winds increasing (calm on Mon night, fresh winds from the WSW by Tue night).
South Twin Sister Weather (Days 3-6):
A light fall of snow, heaviest on Fri morning. Turning milder with light rain (total 5mm) on Sun morning. Freeze-thaw conditions (max 5°C on Thu afternoon, min -1°C on Thu night). Wind will be generally light.
This table gives the weather forecast for South Twin Sister at the specific elevation of 500 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of South Twin Sister. To see the weather forecasts for the other elevations, use the tab navigation above the table. For a wider overview of the weather, consult the Weather Map of Washington.